The loss for 4 km @ 1310 nm = 1.6 dB (0.4 dB / km)
The level should be : 8.6 dBm - 1.6 dBm = 7.0 dBm level
At this input level you'll burn the photo diode.
Sure you are using single mode fiber.
Re: Optical connector help
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Posted in reply to: Optical connector help by catvcarlos
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